Exhibit 4.15 STATE OF DELAWARE SECRETARY OF STATE DIVISION OF CORPORATIONS FILED 03:00 PM 06/28/1995 950145657 - 2520175 CERTIFICATE OF INCORPORATION of MDAS INC. The undersigned incorporator, in order to form a corporation under the General Corporation Law of the State of Delaware, certifies as follows: 1. Name. The name or the corporation is MDAS Inc. (the "Corporation"). 2. Address: Registered Office and Agent. The address of the Corporation's registered office is 9 East Loockerman Street, City of Dover, County of Kent, State of Delaware; and its registered agent at such address is National Corporate Research, Ltd. 3. Purposes. The purpose of the Corporation is to engage in, carry on and conduct any lawful act or activity for which corporations may be organized under the Delaware General Corporation Law. 4. Number of Shares. The total number of shares of stock that the Corporation shall have authority to issue is: One Thousand (1,000), all of which shall be shares of Common Stock of the par value of one cent ($.01) each. 5. Name and Address of Incorporator. The name and mailing address of the incorporator are: Yvonne Y.F. Chan, Esq., 1285 Avenue of the Americas, New York, New York 10019-6064. 6. Election of Directors. Members of the Board of Directors may be elected either by written ballot or by voice vote. 7. Limitation of Liability. No Director of the Corporation shall be personally liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a Director, except for liability (a) for any breach of the Director's duty of loyalty to the Corporation or its stockholders, (b) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (c) under Section 174 of the Delaware General Corporation Law or (d) for any transaction from which the Director derived any improper personal benefits. Any repeal or modification of the foregoing paragraph by the stockholders of the Corporation shall not adversely affect any right or protection of a Director of the Corporation existing at the time of such repeal or modification. 8. Indemnification. 8.1 To the extent not prohibited by law, the Corporation shall indemnify any person who is or was made, or threatened to be made, a party to any threatened, pending or completed action, suit or proceeding (a "Proceeding"), whether civil, criminal, administrative or investigative, 2 including, without limitation, an action by or in the right of the Corporation to procure a judgment in its favor, by reason of the fact that such person, or a person of whom such person is the legal representative, is or was a Director or officer of the Corporation, or is or was serving in any capacity at the request of the Corporation for any other corporation, partnership, joint venture, trust, employee benefit plan or other enterprise (an "Other Entity"), against judgments, fines, penalties, excise taxes, amounts paid in settlement and costs, charges and expenses (including attorneys' fees and disbursements). Persons who are not Directors or officers of the Corporation may be similarly indemnified in respect of service to the Corporation or to an Other Entity at the request of the Corporation to the extent the Board at any time specifies that such persons are entitled to the benefits of this Section 8. 8.2 The Corporation shall, from time to time, reimburse or advance to any Director or officer or other person entitled to indemnification hereunder the funds necessary for payment of expenses, including attorneys' fees and disbursements, incurred in connection with any Proceeding, in advance of the final disposition of such Proceeding; provided, however, that, if required by the Delware General Corporation Law, such expenses incurred by or on behalf of 3 any Director or officer or other person may be paid in advance of the final disposition of a Proceeding only upon receipt by the Corporation of an undertaking, by or on behalf of such Director or officer (or other person indemnified hereunder), to repay any such amount so advanced if it shall ultimately be determined by final judicial decision from which there is no further right of appeal that such Director, officer or other person is not entitled to be indemnified for such expenses. 8.3 The rights to indemnification and reimbursement or advancement of expenses provided by, or granted pursuant to, this Section 8 shall not be deemed exclusive of any other rights to which a person seeking indemnification or reimbursement or advancement of expenses may have or hereafter be entitled under any statute, this Certificate of Incorporation, the By-laws of the Corporation (the "By-laws"), any agreement, any vote of stockholders or disinterested Directors or otherwise, both as to action in his or her official capacity and as to action in another capacity while holding such office. 8.4 The rights to indemnification and reimbursement or advancement of expenses provided by, or granted pursuant to, this Section 8 shall continue as to a person who has ceased to be a Director or officer (or other person indemnified hereunder) and shall inure to the benefit of the 4 executors, administrators, legatees and distributees of such person. 8.5 The corporation shall have power to purchase and maintain insurance on behalf of any person who is or was a Director, officer, employee or agent of the Corporation, or is or was serving at the request of the Corporation as a director, officer, employee or agent of an Other Entity, against any liability asserted against such person and incurred by such person in any such capacity, or arising out of such person's status as such, whether or not the Corporation would have the power to indemnify such person against such liability under the provisions of this Section 8, the By-laws or under Section 145 of the Delaware General Corporation Law or any other provision of law. 8.6 The provisions of this Section 8 shall be a contract between the Corporation, on the one hand, and each Director and officer who serves in such capacity at any time while this Section 8 is in effect and any other person indemnified hereunder, on the other hand, pursuant to which the Corporation and each such Director, officer, or other person intend to be legally bound. No repeal or modification of this Section 8 shall affect any rights or obligations with respect to any state of facts then or theretofore existing or thereafter arising or any proceeding 5 theretofore or thereafter brought or threatened based in whole or in part upon any such state of facts. 8.7 The rights to indemnification and reimbursement or advancement of expenses provided by, or granted pursuant to, this Section 8 shall be enforceable by any person entitled to such indemnification or reimbursement or advancement of expenses in any court of competent jurisdiction. The burden of proving that such indemnification or reimbursement or advancement of expenses is not appropriate shall be on the Corporation. Neither the failure of the Corporation (including its Board of Directors, its independent legal counsel and its stockholders) to have made a determination prior to the commencement of such action that such indemnification or reimbursement or advancement of expenses is proper in the circumstances nor an actual determination by the Corporation (including its Board of Directors, its independent legal counsel and its stockholders) that such person is not entitled to such indemnification or reimbursement or advancement of expenses shall constitute a defense to the action or create a presumption that such person is not so entitled. Such a person shall also be indemnified for any expenses incurred in connection with successfully establishing his or her right to such indemnification or reimbursement or 6 advancement of expenses, in whole or in part, in any such proceeding. 8.8 Any Director or officer of the Corporation serving in any capacity (a) another corporation of which a majority of the shares entitled to vote in the election of its directors is held, directly or indirectly, by the Corporation or (b) any employee benefit plan of the Corporation or any corporation referred to in clause (a) shall be deemed to be doing so at the request of the Corporation. 8.9 Any person entitled to be indemnified or to reimbursement or advancement of expenses as a matter of right pursuant to this Section 8 may elect to have the right to indemnification or reimbursement or advancement of expenses interpreted on the basis of the applicable law in effect at the time of the occurrence of the event or events giving rise to the applicable Proceeding, to the extent permitted by law, or on the basis of the applicable law in effect at the time such indemnification or reimbursement or advancement of expenses is sought. Such election shall be made, by a notice in writing to the Corporation, at the time indemnification or reimbursement or advancement of expenses is sought; provided, however, that if no such notice is given, the right to indemnification or reimbursement or advancement of expenses shall be determined by the law in 7 effect at the time indemnification or reimbursement or advancement of expenses is sought. 9. Adoption, Amendment and/or Repeal of By-Laws. The Board or Directors may from time to time (after adoption by the undersigned of the original By-laws) make, alter or repeal the By-laws by a vote of two-thirds of the entire Board of Directors that would be in office if no vacancy existed, whether or not present at a meeting; provided, however, that any By-laws made, amended or repealed by the Board of Directors may be amended or repealed, and any By-laws may be made, by the stockholders of the Corporation by vote of a majority of the holders of shares of stock of the Corporation entitled to vote in the election of Directors of the Corporation. WITNESS the signature of this Certificate this 28th day of June, 1995. /s/ Yvonne Y.P. Chan ---------------------------------------- Yvonne Y.P. Chan, Incorporator 8